Ukaz Manipulate

Plot[Sin[3*x+4],{x,-4,4}]

Manipulate[Plot[Sin[a*x+b],{x,-4,4}],{a,-3,3},{b,0,5}]

Manipulate[Plot[Sin[a*x+b],{x,-5,5},PlotRange->{{-5,5},{-1,1}}, AspectRatio->Automatic],{a,-3,3},{b,0,5}]

ContourPlot[2*(x^2)+3*(y^2)==1,{x,-2,2},{y,-2,2},Axes->True]

Plot[Sin[x],{x,-2,2},Axes->True,PlotStyle->{Thick,Orange}]

Manipulate[ContourPlot[a*(x^2)+c*x*y+b*(y^2)==1,{x,-5,5},{y,-5,5},Axes->True],{a,-2,2},{b,-2,2},{c,-2,2}]